#include "config-host.h" #include "trace.h" #include "ui/qemu-spice.h" #include "char/char.h" #include <spice.h> #include <spice-experimental.h> #include <spice/protocol.h> #include "qemu/osdep.h" typedef struct SpiceCharDriver { CharDriverState* chr; SpiceCharDeviceInstance sin; char *subtype; bool active; uint8_t *buffer; uint8_t *datapos; ssize_t bufsize, datalen; QLIST_ENTRY(SpiceCharDriver) next; } SpiceCharDriver; static QLIST_HEAD(, SpiceCharDriver) spice_chars = QLIST_HEAD_INITIALIZER(spice_chars); static int vmc_write(SpiceCharDeviceInstance *sin, const uint8_t *buf, int len) { SpiceCharDriver *scd = container_of(sin, SpiceCharDriver, sin); ssize_t out = 0; ssize_t last_out; uint8_t* p = (uint8_t*)buf; while (len > 0) { last_out = MIN(len, qemu_chr_be_can_write(scd->chr)); if (last_out <= 0) { break; } qemu_chr_be_write(scd->chr, p, last_out); out += last_out; len -= last_out; p += last_out; } trace_spice_vmc_write(out, len + out); return out; } static int vmc_read(SpiceCharDeviceInstance *sin, uint8_t *buf, int len) { SpiceCharDriver *scd = container_of(sin, SpiceCharDriver, sin); int bytes = MIN(len, scd->datalen); if (bytes > 0) { memcpy(buf, scd->datapos, bytes); scd->datapos += bytes; scd->datalen -= bytes; assert(scd->datalen >= 0); if (scd->datalen == 0) { scd->datapos = 0; } } trace_spice_vmc_read(bytes, len); return bytes; } #if SPICE_SERVER_VERSION >= 0x000c02 static void vmc_event(SpiceCharDeviceInstance *sin, uint8_t event) { SpiceCharDriver *scd = container_of(sin, SpiceCharDriver, sin); int chr_event; switch (event) { case SPICE_PORT_EVENT_BREAK: chr_event = CHR_EVENT_BREAK; break; default: return; } trace_spice_vmc_event(chr_event); qemu_chr_be_event(scd->chr, chr_event); } #endif static void vmc_state(SpiceCharDeviceInstance *sin, int connected) { SpiceCharDriver *scd = container_of(sin, SpiceCharDriver, sin); #if SPICE_SERVER_VERSION < 0x000901 /* * spice-server calls the state callback for the agent channel when the * spice client connects / disconnects. Given that not the client but * the server is doing the parsing of the messages this is wrong as the * server is still listening. Worse, this causes the parser in the server * to go out of sync, so we ignore state calls for subtype vdagent * spicevmc chardevs. For the full story see: * http://lists.freedesktop.org/archives/spice-devel/2011-July/004837.html */ if (strcmp(sin->subtype, "vdagent") == 0) { return; } #endif if ((scd->chr->be_open && connected) || (!scd->chr->be_open && !connected)) { return; } qemu_chr_be_event(scd->chr, connected ? CHR_EVENT_OPENED : CHR_EVENT_CLOSED); } static SpiceCharDeviceInterface vmc_interface = { .base.type = SPICE_INTERFACE_CHAR_DEVICE, .base.description = "spice virtual channel char device", .base.major_version = SPICE_INTERFACE_CHAR_DEVICE_MAJOR, .base.minor_version = SPICE_INTERFACE_CHAR_DEVICE_MINOR, .state = vmc_state, .write = vmc_write, .read = vmc_read, #if SPICE_SERVER_VERSION >= 0x000c02 .event = vmc_event, #endif }; static void vmc_register_interface(SpiceCharDriver *scd) { if (scd->active) { return; } scd->sin.base.sif = &vmc_interface.base; qemu_spice_add_interface(&scd->sin.base); scd->active = true; trace_spice_vmc_register_interface(scd); } static void vmc_unregister_interface(SpiceCharDriver *scd) { if (!scd->active) { return; } spice_server_remove_interface(&scd->sin.base); scd->active = false; trace_spice_vmc_unregister_interface(scd); } static int spice_chr_write(CharDriverState *chr, const uint8_t *buf, int len) { SpiceCharDriver *s = chr->opaque; assert(s->datalen == 0); if (s->bufsize < len) { s->bufsize = len; s->buffer = g_realloc(s->buffer, s->bufsize); } memcpy(s->buffer, buf, len); s->datapos = s->buffer; s->datalen = len; spice_server_char_device_wakeup(&s->sin); return len; } static void spice_chr_close(struct CharDriverState *chr) { SpiceCharDriver *s = chr->opaque; vmc_unregister_interface(s); QLIST_REMOVE(s, next); g_free((char *)s->sin.subtype); #if SPICE_SERVER_VERSION >= 0x000c02 g_free((char *)s->sin.portname); #endif g_free(s); } static void spice_chr_set_fe_open(struct CharDriverState *chr, int fe_open) { SpiceCharDriver *s = chr->opaque; if (fe_open) { vmc_register_interface(s); } else { vmc_unregister_interface(s); } } static void print_allowed_subtypes(void) { const char** psubtype; int i; fprintf(stderr, "allowed names: "); for(i=0, psubtype = spice_server_char_device_recognized_subtypes(); *psubtype != NULL; ++psubtype, ++i) { if (i == 0) { fprintf(stderr, "%s", *psubtype); } else { fprintf(stderr, ", %s", *psubtype); } } fprintf(stderr, "\n"); } static CharDriverState *chr_open(const char *subtype) { CharDriverState *chr; SpiceCharDriver *s; chr = g_malloc0(sizeof(CharDriverState)); s = g_malloc0(sizeof(SpiceCharDriver)); s->chr = chr; s->active = false; s->sin.subtype = g_strdup(subtype); chr->opaque = s; chr->chr_write = spice_chr_write; chr->chr_close = spice_chr_close; chr->chr_set_fe_open = spice_chr_set_fe_open; QLIST_INSERT_HEAD(&spice_chars, s, next); return chr; } CharDriverState *qemu_chr_open_spice_vmc(const char *type) { CharDriverState *chr; const char **psubtype = spice_server_char_device_recognized_subtypes(); if (type == NULL) { fprintf(stderr, "spice-qemu-char: missing name parameter\n"); print_allowed_subtypes(); return NULL; } for (; *psubtype != NULL; ++psubtype) { if (strcmp(type, *psubtype) == 0) { break; } } if (*psubtype == NULL) { fprintf(stderr, "spice-qemu-char: unsupported type: %s\n", type); print_allowed_subtypes(); return NULL; } chr = chr_open(type); #if SPICE_SERVER_VERSION < 0x000901 /* See comment in vmc_state() */ if (strcmp(type, "vdagent") == 0) { qemu_chr_generic_open(chr); } #endif return chr; } #if SPICE_SERVER_VERSION >= 0x000c02 CharDriverState *qemu_chr_open_spice_port(const char *name) { CharDriverState *chr; SpiceCharDriver *s; if (name == NULL) { fprintf(stderr, "spice-qemu-char: missing name parameter\n"); return NULL; } chr = chr_open("port"); s = chr->opaque; s->sin.portname = g_strdup(name); return chr; } void qemu_spice_register_ports(void) { SpiceCharDriver *s; QLIST_FOREACH(s, &spice_chars, next) { if (s->sin.portname == NULL) { continue; } vmc_register_interface(s); } } #endif static void qemu_chr_parse_spice_vmc(QemuOpts *opts, ChardevBackend *backend, Error **errp) { const char *name = qemu_opt_get(opts, "name"); if (name == NULL) { error_setg(errp, "chardev: spice channel: no name given"); return; } backend->spicevmc = g_new0(ChardevSpiceChannel, 1); backend->spicevmc->type = g_strdup(name); } static void qemu_chr_parse_spice_port(QemuOpts *opts, ChardevBackend *backend, Error **errp) { const char *name = qemu_opt_get(opts, "name"); if (name == NULL) { error_setg(errp, "chardev: spice port: no name given"); return; } backend->spiceport = g_new0(ChardevSpicePort, 1); backend->spiceport->fqdn = g_strdup(name); } static void register_types(void) { register_char_driver_qapi("spicevmc", CHARDEV_BACKEND_KIND_SPICEVMC, qemu_chr_parse_spice_vmc); register_char_driver_qapi("spiceport", CHARDEV_BACKEND_KIND_SPICEPORT, qemu_chr_parse_spice_port); } type_init(register_types);